The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netipsec/keydb.h

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    1 /*      $FreeBSD: stable/4/sys/netipsec/keydb.h 109792 2003-01-24 05:11:36Z sam $       */
    2 /*      $KAME: keydb.h,v 1.14 2000/08/02 17:58:26 sakane Exp $  */
    3 
    4 /*
    5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the project nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 #ifndef _NETIPSEC_KEYDB_H_
   34 #define _NETIPSEC_KEYDB_H_
   35 
   36 #ifdef _KERNEL
   37 
   38 #include <netipsec/key_var.h>
   39 
   40 /*
   41  * The union of all possible address formats we handle.
   42  */
   43 union sockaddr_union {
   44         struct sockaddr         sa;
   45         struct sockaddr_in      sin;
   46         struct sockaddr_in6     sin6;
   47 };
   48 
   49 /* Security Assocciation Index */
   50 /* NOTE: Ensure to be same address family */
   51 struct secasindex {
   52         union sockaddr_union src;       /* srouce address for SA */
   53         union sockaddr_union dst;       /* destination address for SA */
   54         u_int16_t proto;                /* IPPROTO_ESP or IPPROTO_AH */
   55         u_int8_t mode;                  /* mode of protocol, see ipsec.h */
   56         u_int32_t reqid;                /* reqid id who owned this SA */
   57                                         /* see IPSEC_MANUAL_REQID_MAX. */
   58 };
   59 
   60 /* Security Association Data Base */
   61 struct secashead {
   62         LIST_ENTRY(secashead) chain;
   63 
   64         struct secasindex saidx;
   65 
   66         struct sadb_ident *idents;      /* source identity */
   67         struct sadb_ident *identd;      /* destination identity */
   68                                         /* XXX I don't know how to use them. */
   69 
   70         u_int8_t state;                 /* MATURE or DEAD. */
   71         LIST_HEAD(_satree, secasvar) savtree[SADB_SASTATE_MAX+1];
   72                                         /* SA chain */
   73                                         /* The first of this list is newer SA */
   74 
   75         struct route sa_route;          /* route cache */
   76 };
   77 
   78 struct xformsw;
   79 struct enc_xform;
   80 struct auth_hash;
   81 struct comp_algo;
   82 
   83 /* Security Association */
   84 struct secasvar {
   85         LIST_ENTRY(secasvar) chain;
   86 
   87         u_int refcnt;                   /* reference count */
   88         u_int8_t state;                 /* Status of this Association */
   89 
   90         u_int8_t alg_auth;              /* Authentication Algorithm Identifier*/
   91         u_int8_t alg_enc;               /* Cipher Algorithm Identifier */
   92         u_int8_t alg_comp;              /* Compression Algorithm Identifier */
   93         u_int32_t spi;                  /* SPI Value, network byte order */
   94         u_int32_t flags;                /* holder for SADB_KEY_FLAGS */
   95 
   96         struct sadb_key *key_auth;      /* Key for Authentication */
   97         struct sadb_key *key_enc;       /* Key for Encryption */
   98         caddr_t iv;                     /* Initilization Vector */
   99         u_int ivlen;                    /* length of IV */
  100         void *sched;                    /* intermediate encryption key */
  101         size_t schedlen;
  102 
  103         struct secreplay *replay;       /* replay prevention */
  104         long created;                   /* for lifetime */
  105 
  106         struct sadb_lifetime *lft_c;    /* CURRENT lifetime, it's constant. */
  107         struct sadb_lifetime *lft_h;    /* HARD lifetime */
  108         struct sadb_lifetime *lft_s;    /* SOFT lifetime */
  109 
  110         u_int32_t seq;                  /* sequence number */
  111         pid_t pid;                      /* message's pid */
  112 
  113         struct secashead *sah;          /* back pointer to the secashead */
  114 
  115         /*
  116          * NB: Fields with a tdb_ prefix are part of the "glue" used
  117          *     to interface to the OpenBSD crypto support.  This was done
  118          *     to distinguish this code from the mainline KAME code.
  119          */
  120         struct xformsw *tdb_xform;      /* transform */
  121         struct enc_xform *tdb_encalgxform;      /* encoding algorithm */
  122         struct auth_hash *tdb_authalgxform;     /* authentication algorithm */
  123         struct comp_algo *tdb_compalgxform;     /* compression algorithm */
  124         u_int64_t tdb_cryptoid;         /* crypto session id */
  125 };
  126 
  127 /* replay prevention */
  128 struct secreplay {
  129         u_int32_t count;
  130         u_int wsize;            /* window size, i.g. 4 bytes */
  131         u_int32_t seq;          /* used by sender */
  132         u_int32_t lastseq;      /* used by receiver */
  133         caddr_t bitmap;         /* used by receiver */
  134         int overflow;           /* overflow flag */
  135 };
  136 
  137 /* socket table due to send PF_KEY messages. */
  138 struct secreg {
  139         LIST_ENTRY(secreg) chain;
  140 
  141         struct socket *so;
  142 };
  143 
  144 #ifndef IPSEC_NONBLOCK_ACQUIRE
  145 /* acquiring list table. */
  146 struct secacq {
  147         LIST_ENTRY(secacq) chain;
  148 
  149         struct secasindex saidx;
  150 
  151         u_int32_t seq;          /* sequence number */
  152         long created;           /* for lifetime */
  153         int count;              /* for lifetime */
  154 };
  155 #endif
  156 
  157 /* Sensitivity Level Specification */
  158 /* nothing */
  159 
  160 #define SADB_KILL_INTERVAL      600     /* six seconds */
  161 
  162 /* secpolicy */
  163 extern struct secpolicy *keydb_newsecpolicy __P((void));
  164 extern void keydb_delsecpolicy __P((struct secpolicy *));
  165 /* secashead */
  166 extern struct secashead *keydb_newsecashead __P((void));
  167 extern void keydb_delsecashead __P((struct secashead *));
  168 /* secasvar */
  169 extern struct secasvar *keydb_newsecasvar __P((void));
  170 extern void keydb_refsecasvar __P((struct secasvar *));
  171 extern void keydb_freesecasvar __P((struct secasvar *));
  172 /* secreplay */
  173 extern struct secreplay *keydb_newsecreplay __P((size_t));
  174 extern void keydb_delsecreplay __P((struct secreplay *));
  175 /* secreg */
  176 extern struct secreg *keydb_newsecreg __P((void));
  177 extern void keydb_delsecreg __P((struct secreg *));
  178 
  179 #endif /* _KERNEL */
  180 
  181 #endif /* _NETIPSEC_KEYDB_H_ */

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